
#ifndef _DP_ICFFTR2_DIF_H_
#define _DP_ICFFTR2_DIF_H_

void dp_icfftr2_dif(double* x, double* w, unsigned short n);
void gen_w_r2(double* w, int n);
void bit_rev(double* x, int n);

#endif //!_DP_ICFFTR2_DIF_H_